Astrophysics Papers
@AstroPHYPapers
Followers
7K
Following
0
Media
2
Statuses
106K
New Astrophysics submissions to https://t.co/HHqPequzVU (not affiliated with https://t.co/HHqPequzVU)
Worldwide
Joined April 2010
Current observations favour phantom-enhanced nature of dark energy.
arxiv.org
Our study shows that the more a dark energy model allows the equation of state to become phantom-like toward the past, the better it fits current observations which also may lead to stronger...
0
0
0
An effective $\boldsymbol{\Lambda}$-Szekeres modelling of the local Universe with Cosmicflows-4.
arxiv.org
We develop an effective description of the local cosmic environment, namely, for redshift $z \lesssim 0.1$, to quantify the bias induced by local structure on cosmological observables. Our...
0
0
0
Decoupling perturbations from background in $f(Q)$ gravity: the square-root correction and the alleviation of the $\sigma_8$ tension.
arxiv.org
We investigate a perturbation-level modification of symmetric teleparallel gravity of the form $f(Q)=F(Q)+M\sqrt{Q}$ and assess its ability to ease the $σ_8$ tension. The square-root term...
0
0
0
How massive neutrinos reshape the cosmic web.
arxiv.org
We explore the effects of massive neutrinos on the cosmic web using the FLAMINGO simulations. We classify the cosmic web into voids, sheets, filaments, and clusters, and find that massive...
0
0
0
Uniform Rolling: An LSST Observing Cadence Offering Sufficient Survey Uniformity for Comprehensive Cosmological Analysis.
arxiv.org
The Legacy Survey of Space and Time (LSST) that will be carried out by the NSF-DOE Vera C. Rubin Observatory promises to be the defining survey of the next decade, supplying unprecedented access...
0
0
0
The Power of DESI for Photometric Redshift Calibration: A Case Study with KiDS-1000.
arxiv.org
Accurate redshift estimates are a critical requirement for weak lensing surveys and one of the main uncertainties in constraints on dark energy and large-scale cosmic structure. In this paper, we...
0
0
0
Clustering redshift distribution calibration of weak lensing surveys using the DESI-DR1 spectroscopic dataset.
arxiv.org
We estimate the source redshift distribution of current weak lensing surveys by applying the clustering-based redshift calibration technique, using the galaxy redshift sample provided by the Dark...
0
0
0
Cosmological Constraints from Full-Scale Clustering and Galaxy-Galaxy Lensing with DESI DR1.
arxiv.org
We present constraints on cosmic structure growth from the analysis of galaxy clustering and galaxy-galaxy lensing with galaxies from the Dark Energy Spectroscopic Instrument (DESI) Data Release...
0
0
0
Joint cosmological fits to DESI-DR1 full-shape clustering and weak gravitational lensing in configuration space.
arxiv.org
We present a joint $3\times2$-pt cosmological analysis of auto- and cross-correlations between the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1) Bright Galaxy Survey (BGS) and...
0
0
0
DESI-DR1 $3 \times 2$-pt analysis: consistent cosmology across weak lensing surveys.
arxiv.org
We present a joint cosmological analysis of projected galaxy clustering observations from the Dark Energy Spectroscopic Instrument Data Release 1 (DESI-DR1), and overlapping weak gravitational...
0
0
0
The AIDA-TNG project: abundance, radial distribution, and clustering properties of halos in alternative dark matter models.
arxiv.org
Warm and self-interactive dark matter cosmologies have been proposed as non-baryonic solutions to the tensions between the $Λ$ Cold Dark Matter model and observations at the kpc scale. In...
0
0
0
Dark Acoustic Oscillations as an Early-Universe Explanation of the DESI Anomaly.
arxiv.org
DESI DR2 data have been widely interpreted as evidence for late-time evolving dark energy (DE) with an apparent phantom crossing. Here we investigate an alternative explanation, based on...
0
0
0
The AIDA-TNG project: dark matter profiles and concentrations in alternative dark matter models.
arxiv.org
In the standard Cold Dark Matter (CDM) scenario, the density profiles of dark matter haloes are well described by analytical models linking their concentration to halo mass. Alternative scenarios,...
0
0
0
The Simons Observatory: forecasted constraints on primordial gravitational waves with the expanded array of Small Aperture Telescopes.
arxiv.org
We present updated forecasts for the scientific performance of the degree-scale (0.5 deg FWHM at 93 GHz), deep-field survey to be conducted by the Simons Observatory (SO). By 2027, the SO Small...
0
0
1
Spin-filament alignments to unravel galaxy evolution and model intrinsic alignments.
arxiv.org
By the 2040s, several all-sky surveys will have transformed our view of the large-scale structure. However, one of the major outstanding questions in astrophysics will remain: understanding how...
0
0
0
Skykatana: a scalable framework to construct sky masks for the Vera Rubin Observatory and large astronomical surveys.
arxiv.org
Modern wide-field surveys require robust spatial masks to excise bright-star halos, bleed trails, poor-quality regions, and user-defined geometry at scale. We present Skykatana, an open source...
0
0
0
Ultralight Dark Matter Constraints from NanoHertz Gravitational Waves.
arxiv.org
We investigate the impact of ultralight dark matter (ULDM) on the mergers of supermassive black holes (SMBH) and the resulting stochastic gravitational wave background. ULDM is based on...
0
0
0
Why the Northern Hemisphere Needs a 30-40 m Telescope and the Science at Stake: A Low Surface Brightness Science Case.
arxiv.org
The Extragalactic Low Surface Brightness (LSB, $μ_V\gtrsim 27$ mag/arcsec$^2$) Universe represents a crucial, yet largely unseen, frontier in modern astrophysics. This faint realm holds the keys...
0
0
0
Note on bulk viscosity as an alternative to dark energy.
arxiv.org
Bulk viscosity, which characterizes the irreversible dissipative resistance of a fluid to volume changes, has been proposed as a potential mechanism for explaining both early- and late-time...
0
0
0